Controlling mechanism for elevator doors



APPLICAT'ON HLEU MAR.5,192D.

Patented Mar. 21, 1922.

3 SHEEIS -SHEET I.

R. S. PEELLE.

CONTROLLING MECHAMSM F03 ELEVATOR DOORS.

APPLICA'HON FILED MMLEJ, 1920.

Pmma Mar. 21, 1922.

3 SHEhIS-SHEET 2.

R. S. PEELLE. CONTROLHNG MECHANlSM FDR fLEVATOR DOORS.

APPLICATION men MAR- 5, 1920. 1,410,272. Patented Mar. 21,1922.

3 SHEETSSHEET 3.

ROBERT S. PEELLE, OF NEW YORK,

N. Y.. ASSIGNOR TO THE PEELLE COMPANY, OF

BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

CONTROLLING MEGHAN ISM FOR ELEVATOR DOORS.

Specification of Letters Patent. Patented 31 21 1922 Application filed March 5. 1920. Serial No. 363,531.

T 0 all whom it may concern:

Be it. known that 1. Ronnnr b. Inmanc, a citizen of the United States, residing at Hol lis, in the borough of (Queens, city of New York, county of Queens and State of New York, have invented certain new and use ful Improvements in Controlling Mechanisms for Elevator Doors, of which the following is a specification, reference being had therein to the accompanying drawings. which form a part thereof.

My invention relates to controlling mechanisms for elevator doors, and more particularly to such a mechanism of the full automatic type, the term full automatic in this art referring to a. door which may be both opened and closed without the application of manual power thereto.

In an elevator door made in accordance with my invention. I provide, in conjunction with the actuating mechanism for opening; and closing. the door, means whereby the motive power for the actuating mechanism may be so disconnected therefrom as to permit the manual opening and closing of any door in a shaft independently, of said motive power. (.onsidering the invention more specifically, I employ an electric motor controllable from within an elevator car. said motor being connected through a clutch mechanism to a winch drum about which is passed a cable operatively connected with each door in a shaft. in a manner to permit the opening of any door by said controller. said clutch mechanism being adapted to be released by means of a pull cord extending. through the entire height of the elevator shaft adjacent to a car. or other means accessible from a car when it is at any floor.

The actuating means is so constructed that. when the clutch mechanism is operative to transmit power to the drum, the circuit to the motor will be automatically interrupted when the door has attained its fully opened or fully closed position. said clutch mechanism being capable of actuation. however, to disconnect said winch drum from the motor and thus arrest movement of the door at any time in the event of an emergency. so as to impart an additional factor of safety to doors of this character.

The actuating mechanism also embodies a brake structure normally operative upon the motor, and through said clutch mecha nism upon the drum, means being provided for releasing). said brake mechanism when power is applied for the purpose of either opening or closing a door.

I also provide means whereby the cable payed out when closing a door, will be autonmtically taken up by a movable weight adapted to actuate the circuit controlling mechanism and the main power for actuating the car, this mechanism being operative in the same manner whether a door is opened by means of a motor. or manually after the clutch mechanism is relcased.

The invention consists primarily in a controlling mechanism for elevator doors em bodying therein a pluralitv of verticallv sliding doors in a shaft, a source of power. operative connections between said source of power and each door in a shaft, a controller within a car whereby said source of power may be applied to either open or close a door, and means whereby said source of power may be disconnected from said connect ons to permit the manual opening or closing of any door; and in such other novel features of construction and combination of parts are hereinafter set forth and described. and more particularly pointed out in the claims hereto appended.

Referringto the drawings.

Fig. 1 is a view showing a )ortion of an clc 'ator shaft showing two (OOPS therein and a controlling mechanism therefor embodying my invention. the showing being largely diagrammatic;

Fig. 2 is a side view of the winch drum and the clutch mechanism for controlling the application of power thereto;

Fig. 2% is an end view thereof:

Fig. l is a detail \'l( of the brake mecha nism for preventing excess movement of the motor in opening and closing the door: and Fig. 5 is a diagrammatic view of the wiring of the controlling mechanism.

Like letters refer to like parts throughout the several views.

In the embodiment of my invention shown in the drawings. I have indinated at A a portion of an elevator shaft having mounted therein two door structures of a type in which the sections. in opening and closing the doors. have simultaneous movement in opposite directions in the same vertical plane. The construction of each of the doors shown is the same as the other. and duplicate reference letters are therefore used in conjuncsection b.

' overbalances the section a so to open automatically.

tion therewith. prises an upper section a and a lower section 7) connected by the 0 connection (2 passing over the pulleys c. The lower section I) is provided with a hanger bar Z) projecting beyond each side of the The detailed1 construction of the doors is immaterial to t e present invention, and is therefore not shown in the drawings or-herin described.

The section b, in the" type of door shown, that when the latch mechanism of the door released,

which mechanism is shown conventionally at (I, there is'it 'normal tendency of the door In connection with said doors, I provide means whereby any door in a shaft at the landing close bydvhich, a car is at rest, may be opened or closed from a source of power controllable from within the car, means being provided whereby said may be made inoperative as to said doors to either permit the "manual opening or closing of a door or in an emergency prevent the forceful closing of a door, and thus avoid possibility of accidents.

In the form of the invention shown, the source of power consists of a reversible electric motor 6 actuating a worm gear shaft 6 co-operating with a worm gear fparried by a shaft f. Idly mounted upon-theshaft f is a winch drum f power being applied to said drum through the co-operating clutch members i and f, one of which is carried by said drum and the other of which is splined upon the shaft f. Mounted adjacent the clutclrmechanism 4 is a bell crank lever. one arm f of which is forked as shown and provided with pins f projecting within a peripheral groove in the clutch member 7.

The other arm f of said bell crank lever source of power- Each ofthe doors comhas connected therewith a ,pull cord f extending vertically through the shaft adjacent all of the doors thereof, so that the clutch members f and f may be disconnected through the medium of said bell crank lever from adjacent any door in a shaft, and thus disconnect the drum f from the shaft f and permit the said drum to rotate freely upon said shaft.

The clutch members f and f are normally maintained in engagement with each other y the spring f.

xtending about the winch drum 7 is a flexible strip. cable, or other connection 9 having branches g and g passing about the pulleys g and g respectively and opera tivel conilected with each of the doors in a shaft by being passed through an opening in the hanger bar I) in which said extension cables 7' and g are free to slide. This construction is to permit the opening of any door in ashaft upon the actuation of the momovement independently tor e, the strips g and g being ca able of be opene and of of all the other movement with a door to doors in a shaft which remain closed. The extensions 9 and g carry, adjacent and below each hanger barb, a block it adapted to normally engage said hanger bar when the door is closed, to have movement therewith as the door is opened, and to impart move ment to a door during the closing operation,

he extensions g and g each have a Weight, as a, at the lower end thereof to maintain these extensions taut.

Afterpassing about the winch drum 1', the flexible strip or cable 9 passes to a sliding weight j mounted in suitable guides j, said'guidesadjacent the bottomthereof sup porting a make and .break mechanism controlling the circuit to the car actuating means. This weight, by this construction, moves in synchronism with any door being opened and closed, the load of the weight, however, being sustained by the winchdrum f thus relieving the doors of any influence from this weight.

In 1 of the drawings, I have shown the controlling mechanism for the car actuating circuit, merely conventionally, since the details 'of this construction form no part of my present invention. It is desirable, however, to control the application ofpower to a car in accordance with the movement of a door. The weight j in addition to controlling the car actuating circuit, also serves to take up slack resulting from the actuation of the winch drum 7''. I have found it desirable, however, to utilize this take-up mechanism for controlling said main actuating circuit, but do not desire to make this feature of the mechanism essential to the invention considered in its broader aspects.

s a consequence of the mechanism above described, it is apparent that the actuation of the motor e is, when the clutches f ,f are set, essential to both the opening and the closing of a door in a shaft, the extent of such movements of the doors being controlled, by the duration of said motor. the motor to open or close a door to the extent required to either fully open or fully close it, I provide means adapted to act substantially simultaneously with the completion of the closing movement, and with the completion of the opening movement of the door, which will interrupt the circuit to they motor e, thus relieving the operator from any necessity for controlling the duration of the movement of the door through the controller in the car.

This automatic circuit the operation of To limit the operative eflect'of opened or fully cl ed, it will prevent application of power to the motor 6- except to actuate the winch drum f in one direction only, which direction is defined by the position of the door. As will more fully appear hereinafter, this mechanism will permit a partially opened door to be moved in either direction without requiring movement thereof to the fully opened or fully closed position.

In conjunction with the limit switch mech anism, I provide an automatically acting brake operative upon the motor 6, which, upon the interruption of the circuit to the motor e, will be automatically set to prevent possible overrunning of the motor after the interruption of. the circuit, this braking mechanism, however, being released substantially simultaneously with the closing of the circuit to the motor e, and remaining in this condition so long as the circuit to the motor e remains closed.

lVhile the limit switch mechanism operates entirely independently of the controller switches in the car, the actuation of the brake mechanism above referred to is controlled by said controller switches.

In describing said limit switch mechanism, said brake mechanism and said controller mechanism, I will do so in conjunction with the circuits employed in connection with the door actuating mechanism, which circuit is indicated diagrammatically in Fig. 5.

Carried by the car 13 is a controller switch mechanism C consisting of a frame is having upon opposite sides thereof, similar spring contact members k, k 16*, la and iv. The contact members is to 70 upon one side of said frame are adapted to close the various circuits incidental to the opening of a door, while the corresponding contacts upon the other side of the frame are adapted to close the circuits for the closing of a door.

Co-operating with the two sets of contacts above referred to is a bridge contact having two contact members m-m. of electro-conductivc material, one of said contact members as m. being adapted to engage the positive contacts of each group is to k and the other being adapted to engage the negative contacts of said groups.

In the embodiment of the invention shown. two of the contacts. as 70' and h will be elec' trically connected through the wires 1 and 2. to the main line wires 3 and 4 from the source of power for actuating the doors. Others of the contacts, as is and 70, will be connected through the wires 5 and 6 with the field '7 of the motor 6, while the remaining contacts In and is will be electrically con nected through the wires 8 and 9 with the armature brushes. The corresponding contacts upon the opposite side of the members mm' will be connected respectively by the wires 1 and 2 with the source of power ll and l, by the wires 5 and 6 with the field of the motor, and by the wires 8 and 9* with the commutator brushes, there being this difference in the wiring of the two sets of spring contacts, that while the wires 8 and S will be connected respectively with the brushes e and 0 the wires 8 and 9" will be connected respectively with the brushes c and 6', thus reversing the direction of flow of the current in the armature with a result ant reversal of the direction of rotation of the motor. Hence the switch mechanism in addition to its other functions, serves as a pole changer.

The limit switch mechanism comprises two switches a and 0 arranged upon a suitable switch board and spaced apart a distance substantially equaling the movement of a door from the fully opened to the fully closed position, or vice versa.

The switch mechanism it comprises fixed contacts n and n forming a gap in the wire 1, which gap is adapted to be enclosed by a bridge contact 11 carried by an oscillatory lever n acted upon by a spring a to normally bring the contact n in electrical connection with the contacts n and 11 The switch mechanism 0 has contacts 0 and 0 similar to the contacts n-n a bridge contact 0 similar to the contact a and a lever 0 and spring 0" similar to the lever and spring n n. The contacts 0 and 0 form a gap in the wire 1 instead of in the wire 1.- By this construction the circuits to both sets of contacts 71'! to h will be automatically included in the circuit from the main line 3--t when the working conditions about the door actuating mechanism are such as to require this condition.

The lever arms nf-0* and the parts actuated thereby are oppositely set so that while movement of one of said levers in one direction will effect the closing of the circuit. similar movement of the other lever will effect the o )ening of its circuit,

The fiexlble connection g passes through both of the lever arms 71 -0 and has secured thereto. intermediate said arms, contact balls or blocks pp' adapted respectively to co-operate with said levers upon a predeterminet movement of said connection g.

The brake mechanism above referred to comprises a disc carried by and rotatable with the shaft 6. Pivotally mounted adjacent said disc. are brake shoes q-q one of which. 9'. has pivotally mounted thereon a bell crank lever (1", one arm of which is connected by means of the adjustable link 9 with the other shoe Mounted adjacent the disc (I is a solenoid or other electro magnet r, the core of which is pivotally connected with said bell crank lever. said core being so set that upon the energizing of the magnet r, the bell crank pose for which this switch may be used.

lever r will be so oslcillated as to releasethe brake shoes 9' and Acting upon the bell The operation oil the herein described mechanism is substantially as follows i Assuming-that the parts are in the pdsition shown in Fig. l of the drawings, the various doors in a shaft will be closed, the brake shoes" g'g being set .upon the disc q through the mediuni of the spring T which, acting upon the core of the solenoid r as a fulcrum, will draw the brake shoe 9 against the brake drum (1 through the medium of the link 9 the resistance encountered by the. shoe 9 reacting through the lever g and link 9 to similarly set the shoe g, thus normally preventing rotation of the winch drum f and thus serve to effectively lock all of the doors in a shaft, supplementing in this respect the individual locked operative in connection with the'several doors. The locking of each door through the medium of the Winch f results from the fact that this, winch is held against rotation, thus preventing lineal traverse of the cables 9, g and 9 so that the blocks it carried by the cables 9' and. 9 will be engaged with the hanger bars of the several doors.

Under this condition it is impossible to open any door in a shaft except from the car B, the individual locks d preventing the opening of any door except that closing the opening at the floor at which the car B is standing.

Assuming that the car ascends to the door-" way toward the top of Fig. 1, and it is desued to open this door, when the car is brought to rest, the lock (Z will be released by a suitable mechanism on the car when the t pe of lock shown in the drawings is used. uy other desired form of lock may be used,

however, in lieu of that shown, my invention not relating to the form of individual lock employed.

When it is desired to open a door by the application of power from the motor 6, the contact members m and m are brought into engagement with the contacts k to k of one group of said contacts. At this time the switch mechanism n will be so set as to close the circuit through the wire 1, so that with the movement of the members mm, the following results will occur simultaneously. The field 7 of the motor ewill be energized, the current will pass to the motor armature, and the solenoid 7' will be energized to release the brake shoes 9 and 9 5 bars, the doors,

1 herent thereto,

dividual locks d.

When the circuit is thus closed the winch a the descent of the blocks it carried by the extensions 9' and 9 adjacent the hanger bar b'of that door. Fhe blocks h adjacent the othen doors will merely reeede from their respective ha'n r since'the cables g, and g y reason of the weights 2' and of the weight inwill descend by avity, bemg held in the closed position With the paying out of the portion of the therr inj strip or cable 9 between the winch drum f and the several doors, that. portion of said or cable 9 between the winch drum and stri the block j will be taken up, thus simultaneaously permitting the opening'of a door, and raising the bloc j.

With the initial movement" of an block j, the make and break mechanism 7' will be automatically actuated to prevent application of power to the car, thus preventing the car leaving the floor untilthe door has again been closed.

\Vith the paying out of the strip or cable 9 in the manner above referred to, the block 72 will recede from the lever 0*, thus permitting the actuation of the lever under the spring 0", so as to close the gap in the line 1 through the contacts a a and 0, and include the opposite set 01 contacts k to k in the main circuit 3-4.

With the interruption of the circuit to the motor e by the contact members m-nn', the brake members {-9 will instantly set upon the drum under the influence of the spring r, t us preventing overrunnin of the motor with a resultant excess movement of the doors.

Under this condition it will be observed that both switches no are so set as to close the circuits through the wires 1 andl respectively, thus permitting either set of contacts is to k to be used so that the door may be either opened or closed, as desired.

So long as the circuits are closed to effect the opening of a door until the door is fullv opened, the closing of the circuit through the wiring 1* in the manner above referred to will have no influence in the functionin of the device. Wlien the door approaches a fully open position, however, the ball or block 39 upon the stri or cable 9 will engage the lever n, and wit the completion of the opening movement said lever in a manner to separate the contacts n, n and n open the circuits to the door actuating mechanism, independently of any action of the operator, or any movement of the 'icontact members m-m'.

and thus automatically of the door, oscillate winch drum f in excess of that required to fully open the door. is thus prevented.

While the opening of the door will result primarily because of the greater weight in the section b than in the section a. the speed bf movement will be controlled entirely by the motor ?-through the winch drum 7, the worm gear drive of saidwinch drum not only serving as a speed reducing transmission. but also as a lock which will relieve the door structure from any counter-balancing effect from the weight j. Of course. it is understood that the strip or cable is passed several times about said winch drum.

\Vhen a door is fully opened. if an operator should engage the contact members mm' with the wrong set of contacts is to In this will haveno effect on the electrical conditions, since the limit switch 71 will be maintained in a. condition which will pre vent the flow of the current from the motor (2 or solenoid r. Hence if it be desired to close the door, the contact members m-m' must be engaged with the other set of contacts 70' to is to close the circuits to the two brushes '6 but with the opposite polarity to the solenoid r, with a resultant release of thebrake shoes g"--g and the actuation of the motor 6 and winch drum F. but in the reversedirection.

As a result of this reversal of the direction of rotation of the winch drum f it will pay out the strip or cable 9 between it and the weight j, while a. lifting action upon the open door will be exerted by the blocks I2. upon the extensions gg \Vith the initial movement of the door, the block 1 will recede from the lever 11', thus permitting the spring at to actuate said lever in a manner to again close the circuit through the wire 1.

As the door approaches the closed position, the block 7) will engage the lever 0*. and

- actuate said lever upon the completion of said closing movement. in a manner to interrupt the circuit through the wire 1 and thus interrupt the various circuits to the door actuating mechanism. and automatically arrest i'urthcr movement of the doors.

If. from any cause. the circuit to the motor should be so interrupt d as to prevent the application of power thereto to permit the opening or cii'cct the closing of a door. the worm gear truusniissimi and the brake mechanism would effectively loch all doors in a shaft. The clutch members f f are provided to illttt such an emergency as well as' to permit an instantaneous stoppage of the closing movement oi a door in the event of the presence of an obstruction. such as a part of the human body.

"With a loss oi power to the motor 6. it is merely necessary for the operator within a car to exert a downwa d pull upon the pull cord f, thus rocking the lever j f in a manner to slide the clutch member f along the shaft f until said member is disengaged from the (o-operating clutch member f. \Vhen said clutch members are thus disengaged. the door closing the opening where a car is at rest. may be freely opened and closed by hand. \Yhen a door has been fully closed the operator may lock same by merely releasing the cord. f. the spring f automatically causing the re-engagement of said clutch members. so that the worm gear transmission and the brake mechanism will again become operative. This condition is only necessary when the lower door section overbalances the upper door section. T his. however. is the usual condition with full automatic doors.

W'hen closing a door by IDilIlS oi the motor 6, continuous power is applied theretoso that even though the power required is low, injury might resultif a person should interpose any portion of his body between the door sections (e?). In such an emergency the operator would. merely have to actuate the clutch members f f in the manner above described. to disconnect the drum 7' from the shaft f. and thus instantly arrest movement of the door sections. without interrupting the circuit to said motor. and furthermore, cause an instantaneous rcversal in the direction of movement oi the door sections.

The weight will take up all slack in the cable 1 as it is created by the winch drum 7. said weight. as the doors approach their closing movement. actuating the make and break mechanism j in a manner to close the circuit to the car actuating mechanism and thus permit power to be applied to the car tor movement in either direction.

By the foregoing it will be observed that any door in a shaft may be opened and closed by means of a single door actuating mechanism: but that when a door is opened this mechanism can be operated only in a. manner to close the door: that when a door is closed it may be actuated only in a man ner to open the door; and that when a door is partially opened. it may be actuated either to fully open or fully close it. It will also be observed that the automatic brake mechanism operative upon the motor e. and the power transmission nicchzinism connecting the motor c with the winch drum f. will not only cilcctivcly prevent ovcrrunning of the motor and of the winch drum upon the interruption l the irrnit to the former. but will serve to cil wiiiclv loci: the doors when in the (leased position and prevent the forcihie opcnil'ig thcrcoi' from the floor side of the door =ning.

The winch drum may. inovcvcr. in an emergency. he disc-o1 wtcd fr m the trans mission 12 "hanism. to permit the manual opention of a door. a i

may be instantly converted into semi-automatic doors, and thus permit an elevator to he kept in service notwithstanding electrical conditions which might prevent the use of the motor c.

The mechanism shown in the accompany drawings, 1 have found highly satisfactory in actual use, but there may be many variations thereof securing the desired operative effects, without departing from the spirit and scope of the invention. It is, therefore, not my intention to limit the invention to the precise details of construction shown'in the accompanying drawings.

Having described my invention, what I claim as new and desire to have protected by Letters Patent, is

1. A controlling mechanism for elevator doors embodying therein a plurality of vertically sliding doors in ashaft, a source of power, operative connections between said source of power and each door in the shaft, including therein members adapted to simultaneously engage the severalcdoors in a shaft and to haye movement with any door being opened or closed, and move inde endently of the doors which remain cosed, a controller within a car whereby said source of power may be applied to either open or close a door, and means whereby said source ,of power may be disconnected from said connectionsfto permit manual actuation of a door.

2. A controlling mechanism for elevator doors embodying therein a plurality of verti- 1 a flexible connection cally sliding doors in a shaft,an electric motor, a winch drum, a power transmission mechamsm'connectmg said motor and said drum lncluding therein a clutch mechanism, means adgacent each door in the shaft whereby said clutch mechanism may be ac tuated to'make said transmission mechanism inoperative in relationto said drum, passing about said winch drum and operatively connected with each door in the shaft, and a controller for the circuit to said motor arranged within.

a car.

3. A controlling mechanism for elevator doors embodying therein a plurality of V81.- tically sliding doors in a shaft, an'electric motor. a winch drum, a power transmission mechanism connecting said motor andsaid drum including therein a clutch .mechanisni, means adjacent each door in the shaft whereby said clutch mechanism may be actuated to make said transmission mechanism inoperative in relation to said drum, :1 flexible connection passing about said winch drum and 0 )eratively connected with each door in the s aft. :1 controller for the circuit to said motor arranged within a. car, and means adapted to automatically inter has reached thefully opened, and the fully i closed, position.

'4. A controlling mechanismfor elevator doors embodyin therein a plurality of vertically sliding oors in a shaft, an electric motor, a winch 'drum, a power transmission mechanism connecting said motor and said drum including therein a clutch mechanism, means adjacent each door in the'shaft whereby said clutch mechanism'may beactuated to make said transmission mechanism inoperative in relation to said drum, a flexible connection passing about said winch drum and 'operatively connected with each door in the shaft, 9. controllenfor the circuit to said motor arranged within a; car, means adapted to automatically interrupt the circuit to said motor when a door has reached the fully opened, and the fully closed, position, a brake mechanism, means tending to normally set said brake mechanism to prevent movement of said motor and said winch drum, and an electro magnet operative'to relieve said brake mechanism, said ma et being included in a circuit ,from said controller, whereby said brake mechanism will be released only while thecircuit to said motor is closed.

5. A controlling mechanism, for elevator doors embodying therein a plurality of vertically sliding doors in a shaft, a reversible electric motor, a. winch drum, a power transmission mechanism connecting said motor and said drum, including therein a clutch mechanism,-means-adjacent each door in the shaft, whereby said clutch mechanism may be actuated tomake said transmission mechanism inoperative in relation to said drum, afiexible connection passing about said winch drum and operatively connected with each door in the shaft, a controller embodying therein a pole changing switch mechanism for the circuit to said'motor, and means adapted to automatically interrupt the circuit to said motor when a door has reached the fully opened, and the fully closed, position.

6. A controlling mechanism for elevator doors embodying therein a plurality of vertically sliding doors in a shaft, a reversible lectric motor, a winch drum, a power transmission mechanism connecting said motor and said drum, including'therein aclutch mechanism, means adjacent each door in the shaft, whereby s id clutch mechanism may be actuated to make said transmission mechanism inoperative in relation to said drums-a flexible connection passing about said winch drum and operatively connected with each door in the shaft, :1- controller for the circuit to said motor, embodying therein electrical contacts in circuit with the line, other electrical contacts in circuit with the motor, and movable contacts adapted respectively to closeithe circuitsfthrou'gh said contacts, and means adapted to automatically interrupt the circuit to said motor when said' tically sliding doors in a shaft, a reversiblev electric motor, a winch drum, a power transmission mechanism connecting said motor and said drum, including therein a clutch mechanism, means adjacent each door in the shaft, whereby said clutch mechanism may be actuated tomakesai transmission r'nechanism inoperative in relation to said drum, a flexible connection passing about said winch drum and operatively'connected with each door in the shaft, a controller for the circuit to said motor arranged within a car, a limit switch mechanism whereby the operative effect of said controller will be determined by the position of any door in the shaft, and means whereby the circuit from which power to move the car is derived, will be "automatically interrupted with the actuation of said drum to open a door, and will be automatically restored upon the completion of the actuation of said drum to close the door.

8. A controlling mechanism for elevator doors embodyin therein a plurality of vertically sliding oors in a shaft, a reversible electric motor, a winc'h drum, a power transmission mechanism connecting said motor and said drum, including therein a clutch mechanism, means adjacent each door in the shaft, whereby said clutch mechanism may be actuated to make said transmission mechanism inoperative in relation to said drum, a flexible connection passing about said winch drum and o eratively connected with each door in the sliaft, a controller for the circuit to said motor arranged within a car, a limit switch mechanism whereby the operative effect of said controller will be determined by the position of any door in the shaft, a make and break echanism arranged in the circuit from whicl? power to move the car is derived, and a sliding weight connected with the end of said flexible connection after it is passed about said drum,

' whereby said weight will be causedto actuate said make and break mechanism to interrupt the circuit substantially simultaneously with the initial opening movement of the door under the control of said drum and said motor. and will close said circuit substantially simultaneously with the completion of said closing movement.

9. A controlling mechanism for elevator doors embodying tl1 I1 a plurality of vertically sliding door, ,1 a shaft. an electric motor. a rotatable shaft, a worm gear transmission connecting said motor and said sh aft, a winch drum idly mounted on said shaft,

a clutch member carried thereby, a co-operatingclutch member slidably mounted upon and rotatable with said shaft, means whereby said last named clutch member may be disengaged from its co-opera-ti'ng member, including means adjacent each door in the shaft, a, flexibleconnection passing about said which drum and operatively connected with each door in the shaft, and a controller for the circuit to said motor arranged within a car. 7

10. A controlling mechanism for elevator doors embodying therein a plurality of vertically sliding doors in a'shaft, an elecmay be disengaged frbm its co-operatin,i

member, including means adjacent each door in the shaft, a flexible connection passing about said winch drum and operatlvely connected with each door in the shaft, and a controller for the circuit to said motor arranged within a car.

11. A controlling mechanism 'for elevator doors embodying therein a plurality of vertically sliding doors in a shaft, an electric motor, a rotatable shaft, a worm gear transmission connecting said motor and said shaft, a winch drum idly mounted on said shaft. a clutch member carried thereby, a co-operating clutch member slidably mounted upon and rotatable with said shaft, means whereby said last named clutch member may be disengaged from its co-operating member, including means adjacent each door in the shaft, a make and break mechanism arranged in the circuit from which ower to move the car is derived, a sliding weight cooperating with said make and break mechanism, a flexible connection passing about said winch drum, one end of said connection being operatively connected with each door in the shaft, and the other end thereof being connected with said weight, whereby said weight will be caused to actuate said-a make and break mechanism to interrupt the circuit substantially simultaneously with the initial opening movement of a door. and will close said door substantially simultaneously witlr the completion of the closing movement of said door, and a controller for the circuit to said motor wranged within a car.

11?, A controlling mechanism for elevator in 3S embodying therein a plurality of vertical y sliding doors in a shaft, an electric moi-1w. a rotatable shaft. a worm gear transcouzwting said motor and said member, including means adjacent each 10' door in the shaft, :1 make and break mechanism arranged in the'circuit from which powerto move the car is derived, a slidin Weight co-operating with said make an break mechanism, a flexible connection pass- 7 ing about said winch drum,one end of said connection belng operatively connected with each door in the shaft, and theother end thereof being connected with said weight,

whereby said Weight will be caused to actuate said make and break mechanism to interrupt the circuit substantially simultaneously with the initial openin movement of a door. and will close sai door substantially simultaneously with the comple' tion of the closing movement of'said door,

and a controller for the circuit to saidi motor arranged within a car.

In witness whereof I have hereunto affixed my signature, in the presence of two subscribing witnesses, this 18th day of February, 1920.

i ROBERT s. PEELLE.

\Vitnesses': v a i F. T. Wnnrwomrn, A. E. BENTON. 

